The DYS 447 = 24, DYS 576 = 17 Group

MacLochlainn of Tirconnell

25 marker test

 

The following table shows the genetic distance of our large group of McLaughlins and one Bennett (adopted). All match the McLaughlin modal except for 84149, who has only the DYS 447 = 24 part of the modal. Genetic distance in the group runs from 0 (exact match) to 5, with the great majority at 1 or 2 GD.


Genetic Distance
ID P
8
5
3
Z
C
5
4
A
S
W
9
T
P
C
s
1
0
0
1
Y
X
3
9
S
K
A
9
R
Y
6
7
9
1
2
9
F
7
N
8
8
4
1
4
9
2
B
Z
V
G
Q
7
K
M
X
W
7
F
K
Y
3
6
3
7
0
N
K
3
A
G
R
B
Z
7
M
P853Z 25 2 2 2 2 2 1 2 2 2 2 1 1 3 2
C54AS 2 25 4 4 4 4 3 4 4 4 4 3 3 5 4
W9TPC 2 4 25 4 4 4 3 2 4 4 4 1 3 5 4
s1001 2 4 4 25 2 2 1 2 2 2 2 1 1 3 3
YX39S 2 4 4 2 25 2 1 2 2 2 2 2 1 3 3
KA9RY 2 4 4 2 2 25 1 2 2 2 2 2 1 3 3
67912 1 3 3 1 1 1 25 1 1 1 1 1 0 2 2
9F7N8 2 4 2 2 2 2 1 25 2 2 2 1 1 3 3
84149 2 4 4 2 2 2 1 2 25 0 0 1 1 3 3
2BZVG 2 4 4 2 2 2 1 2 0 25 0 1 1 3 3
Q7KMX 2 4 4 2 2 2 1 2 0 0 25 1 1 3 3
W7FKY 1 3 1 1 2 2 1 1 1 1 1 16 1 1 2
36370 1 3 3 1 1 1 0 1 1 1 1 1 25 2 2
NK3AG 3 5 5 3 3 3 2 3 3 3 3 1 2 25 4
RBZ7M 2 4 4 3 3 3 2 3 3 3 3 2 2 4 25
Related Probably Related Possibly Related
FTDNA's Interpreting Genetic Distance for 12 Markers
FTDNA's Interpreting Genetic Distance for 25 Markers
FTDNA's Interpreting Genetic Distance for 37 Markers
- Infinite allele mutation model is used
- Values on the diagonal indicate number of markers tested


The guidelines on genetic distance on the FTDNA site state that a genetic distance of 4 normally means you aren't related, unless you match an "inbetweener" or the "center" of the group. That does appear to be the case in our McLaughlin group. Almost everyone in this group match both 67912 and 36370 at a genetic distance of 1 or 2. The Outliers match others in this group by at most a genetic distance of 2, even though they may be 4 or 5 GD away from other members.


FTDNA Guidelines

4 Not Related 21/25 is too far off to be considered related. Unlikely but vaguely possible that the rule for ONLY “Probably Not Related” applies. It is important to determine what set of results (or haplotype) most typifies 'most' members of the group you are close to matching. You may be 21/25 with an individual, but 23/25 with the center (most common) of the group, and your potential relatedness to him is through the center of the group.



Time to most recent common Ancestor (TMRCA) estimates place most of the group with a common ancestor ranging from 1297 AD. to 1557 AD. The outliers in the group have dates of 357 to 557 AD. These earlier dates do not seem to be reliable.


Time to Most Recent Common Ancestor (Years)
ID P
8
5
3
Z
C
5
4
A
S
W
9
T
P
C
s
1
0
0
1
Y
X
3
9
S
K
A
9
R
Y
6
7
9
1
2
9
F
7
N
8
8
4
1
4
9
2
B
Z
V
G
Q
7
K
M
X
W
7
F
K
Y
3
6
3
7
0
N
K
3
A
G
R
B
Z
7
M
P853Z 25 720 720 720 720 720 450 720 720 720 720 900 450 1020 720
C54AS 720 25 1350 1350 1350 1350 1020 1350 1350 1350 1350 2100 1020 1650 1350
W9TPC 720 1350 25 1350 1350 1350 1020 720 1350 1350 1350 900 1020 1650 1350
s1001 720 1350 1350 25 720 720 450 720 720 720 720 900 450 1020 1020
YX39S 720 1350 1350 720 25 720 450 720 720 720 720 1470 450 1020 1020
KA9RY 720 1350 1350 720 720 25 450 720 720 720 720 1470 450 1020 1020
67912 450 1020 1020 450 450 450 25 450 450 450 450 900 180 720 720
9F7N8 720 1350 720 720 720 720 450 25 720 720 720 900 450 1020 1020
84149 720 1350 1350 720 720 720 450 720 25 180 180 900 450 1020 1020
2BZVG 720 1350 1350 720 720 720 450 720 180 25 180 900 450 1020 1020
Q7KMX 720 1350 1350 720 720 720 450 720 180 180 25 900 450 1020 1020
W7FKY 900 2100 900 900 1470 1470 900 900 900 900 900 16 900 900 1470
36370 450 1020 1020 450 450 450 180 450 450 450 450 900 25 720 720
NK3AG 1020 1650 1650 1020 1020 1020 720 1020 1020 1020 1020 900 720 25 1350
RBZ7M 720 1350 1350 1020 1020 1020 720 1020 1020 1020 1020 1470 720 1350 25
0-270 Years 300-570 Years 600-870 Years 900-1170 Years
- Infinite allele mutation model is used
- Average mutation rate varies: 0.0018 to 0.0023
     rates derived by Doug McDonald from the Sorenson database
- Values on the diagonal indicate number of markers tested
- Probability is 50% that the TMRCA is no longer than indicated
- Average generaton: 30 years


MacLochlainn of Tirconnell Dates

The first to bear the surname MacLochlainn in Donegal was Ardgar MacLochlainn, the King of Aileach, who died in 1064 A.D. He was literally the "son of Lochlan". Beyond this we can't say much. We don't know the exact ancestry of Lochlan with certainty. Nor do we know if he had other sons than Ardgar. His descendants are referred to in the annals as both O'Lochlainn and MacLochlainn until finally MacLochlainn became the norm. But as far as we know all McLaughlins today descended from the MacLochlainn of Donegal sept are descended from Ardgar MacLochlainn.

1051  [AU] Mac Lochlainn was expelled from the kingship of Telach-og, and Aedh Ua Ferghail was made king.

1064 [AU]  Airdgar Mac Lochlainn, king of Aileach, died in Telach-og
and was buried in Ard-Macha, in the mausoleum of the kings."


According to the O'Clery Book of Genealogies, all McLaughlins of Donegal descend from Domhnall MacLochlainn, the King of the Cenel Eoghain, slain in 1241 at the Battle of Caim Eirge.

1241 [AU] The battle of Cam-eirghi was given by Brian O'Neill and Mael-Sechlainn O'Domnaill, king of Cenel-Conaill, to Domnall Mag Lochlainn, namely to the King of Tir-Eogain, so that Domnall Mag Lochlainn was killed therein and ten of his own tribe around him and all the chiefs of Cenel-Eogain and many other good persons likewise. And the kingship was taken by Brian O'Neill after him.

This was a bloody battle. Most of the commentators state that most of Domhnall MacLochlainn's derbfine were slain, so the idea that all McLaughlins living in the late 1500s (when the O'Clery genealogies may have been first composed) are descended from him is at least plausible. Some of the very early dates for TMRCA would appear to contradict the genealogies though.

The O'Clery Genealogies also show three groups of McLaughlins that descend from this line. The genealogies themselves are corrupt and there is no agreement as to the correct interpretation. One version shows each group descending from a common ancestor sometime in the early 15th century. In the genealogies, the groups are headed by Aibhne, from whom descended the MacLochlainns of Redcastle; Owen 'the official,' from whom most likely descend the MacLochlainns of Derry; and The Eoghanacht, from whom descend the MacLochlainns of Whitecastle.

The last known McLaughlin chief of sept was Brian oge McLaughlin in the line of the Eoghanacht; but English records of the time also mention Hugh Carrach McLaughlin as chief (from the line of Aibhne). Although the subsequent history of Brian oge's family is traced in Amy Young's "Inishowen" (lifted verbatim from an earlier work by Magtochair) no modernday descendant has ever been found. We therefore have no one to test that might give us a clue as to the different DNA branches of the sept.